mirror of
https://gitlab.com/libvirt/libvirt.git
synced 2024-10-02 04:15:46 +00:00
qemu: add functions to start and stop nbdkit
Add some helper functions to build a virCommand object and run the nbdkit process for a given virStorageSource. Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com> Reviewed-by: Peter Krempa <pkrempa@redhat.com>
This commit is contained in:
Jonathon Jongsma
parent
4a632de2ac
commit
8d73929e04
@ -24,6 +24,8 @@
|
||||
#include "virerror.h"
|
||||
#include "virlog.h"
|
||||
#include "virpidfile.h"
|
||||
#include "virsecureerase.h"
|
||||
#include "virtime.h"
|
||||
#include "virutil.h"
|
||||
#include "qemu_block.h"
|
||||
#include "qemu_conf.h"
|
||||
@ -666,6 +668,168 @@ qemuNbdkitInitStorageSource(qemuNbdkitCaps *caps,
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
qemuNbdkitProcessBuildCommandCurl(qemuNbdkitProcess *proc,
|
||||
virCommand *cmd)
|
||||
{
|
||||
g_autoptr(virURI) uri = qemuBlockStorageSourceGetURI(proc->source);
|
||||
g_autofree char *uristring = virURIFormat(uri);
|
||||
|
||||
/* nbdkit plugin name */
|
||||
virCommandAddArg(cmd, "curl");
|
||||
if (proc->source->protocol == VIR_STORAGE_NET_PROTOCOL_HTTP) {
|
||||
/* allow http to be upgraded to https via e.g. redirect */
|
||||
virCommandAddArgPair(cmd, "protocols", "http,https");
|
||||
} else {
|
||||
virCommandAddArgPair(cmd, "protocols",
|
||||
virStorageNetProtocolTypeToString(proc->source->protocol));
|
||||
}
|
||||
virCommandAddArgPair(cmd, "url", uristring);
|
||||
|
||||
if (proc->source->auth) {
|
||||
g_autoptr(virConnect) conn = virGetConnectSecret();
|
||||
g_autofree uint8_t *secret = NULL;
|
||||
size_t secretlen = 0;
|
||||
g_autofree char *password = NULL;
|
||||
int secrettype;
|
||||
virStorageAuthDef *authdef = proc->source->auth;
|
||||
|
||||
virCommandAddArgPair(cmd, "user",
|
||||
proc->source->auth->username);
|
||||
|
||||
if ((secrettype = virSecretUsageTypeFromString(proc->source->auth->secrettype)) < 0) {
|
||||
virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
|
||||
_("invalid secret type %1$s"),
|
||||
proc->source->auth->secrettype);
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (virSecretGetSecretString(conn,
|
||||
&authdef->seclookupdef,
|
||||
secrettype,
|
||||
&secret,
|
||||
&secretlen) < 0) {
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
|
||||
_("failed to get auth secret for storage"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* ensure that the secret is a NULL-terminated string */
|
||||
password = g_strndup((char*)secret, secretlen);
|
||||
virSecureErase(secret, secretlen);
|
||||
|
||||
/* for now, just report an error rather than passing the password in
|
||||
* cleartext on the commandline */
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
|
||||
_("Password not yet supported for nbdkit sources"));
|
||||
|
||||
virSecureEraseString(password);
|
||||
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (proc->source->ncookies > 0) {
|
||||
/* for now, just report an error rather than passing cookies in
|
||||
* cleartext on the commandline */
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
|
||||
_("Cookies not yet supported for nbdkit sources"));
|
||||
return -1;
|
||||
}
|
||||
|
||||
if (proc->source->sslverify == VIR_TRISTATE_BOOL_NO) {
|
||||
virCommandAddArgPair(cmd, "sslverify", "false");
|
||||
}
|
||||
|
||||
if (proc->source->timeout > 0) {
|
||||
g_autofree char *timeout = g_strdup_printf("%llu", proc->source->timeout);
|
||||
virCommandAddArgPair(cmd, "timeout", timeout);
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
qemuNbdkitProcessBuildCommandSSH(qemuNbdkitProcess *proc,
|
||||
virCommand *cmd)
|
||||
{
|
||||
const char *user = NULL;
|
||||
virStorageNetHostDef *host = &proc->source->hosts[0];
|
||||
g_autofree char *portstr = g_strdup_printf("%u", host->port);
|
||||
|
||||
/* nbdkit plugin name */
|
||||
virCommandAddArg(cmd, "ssh");
|
||||
|
||||
virCommandAddArgPair(cmd, "host", host->name);
|
||||
virCommandAddArgPair(cmd, "port", portstr);
|
||||
virCommandAddArgPair(cmd, "path", proc->source->path);
|
||||
|
||||
if (proc->source->auth)
|
||||
user = proc->source->auth->username;
|
||||
else if (proc->source->ssh_user)
|
||||
user = proc->source->ssh_user;
|
||||
|
||||
if (user)
|
||||
virCommandAddArgPair(cmd, "user", user);
|
||||
|
||||
if (proc->source->ssh_host_key_check_disabled)
|
||||
virCommandAddArgPair(cmd, "verify-remote-host", "false");
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static virCommand *
|
||||
qemuNbdkitProcessBuildCommand(qemuNbdkitProcess *proc)
|
||||
{
|
||||
g_autoptr(virCommand) cmd = virCommandNewArgList(proc->caps->path,
|
||||
"--unix",
|
||||
proc->socketfile,
|
||||
"--foreground",
|
||||
NULL);
|
||||
|
||||
if (proc->source->readonly)
|
||||
virCommandAddArg(cmd, "--readonly");
|
||||
|
||||
if (qemuNbdkitCapsGet(proc->caps, QEMU_NBDKIT_CAPS_FILTER_READAHEAD) &&
|
||||
proc->source->readahead > 0)
|
||||
virCommandAddArgPair(cmd, "--filter", "readahead");
|
||||
|
||||
switch (proc->source->protocol) {
|
||||
case VIR_STORAGE_NET_PROTOCOL_HTTP:
|
||||
case VIR_STORAGE_NET_PROTOCOL_HTTPS:
|
||||
case VIR_STORAGE_NET_PROTOCOL_FTP:
|
||||
case VIR_STORAGE_NET_PROTOCOL_FTPS:
|
||||
case VIR_STORAGE_NET_PROTOCOL_TFTP:
|
||||
if (qemuNbdkitProcessBuildCommandCurl(proc, cmd) < 0)
|
||||
return NULL;
|
||||
break;
|
||||
case VIR_STORAGE_NET_PROTOCOL_SSH:
|
||||
if (qemuNbdkitProcessBuildCommandSSH(proc, cmd) < 0)
|
||||
return NULL;
|
||||
break;
|
||||
|
||||
case VIR_STORAGE_NET_PROTOCOL_NONE:
|
||||
case VIR_STORAGE_NET_PROTOCOL_NBD:
|
||||
case VIR_STORAGE_NET_PROTOCOL_RBD:
|
||||
case VIR_STORAGE_NET_PROTOCOL_SHEEPDOG:
|
||||
case VIR_STORAGE_NET_PROTOCOL_GLUSTER:
|
||||
case VIR_STORAGE_NET_PROTOCOL_ISCSI:
|
||||
case VIR_STORAGE_NET_PROTOCOL_VXHS:
|
||||
case VIR_STORAGE_NET_PROTOCOL_NFS:
|
||||
case VIR_STORAGE_NET_PROTOCOL_LAST:
|
||||
virReportError(VIR_ERR_NO_SUPPORT,
|
||||
_("protocol '%1$s' is not supported by nbdkit"),
|
||||
virStorageNetProtocolTypeToString(proc->source->protocol));
|
||||
return NULL;
|
||||
}
|
||||
|
||||
virCommandDaemonize(cmd);
|
||||
|
||||
return g_steal_pointer(&cmd);
|
||||
}
|
||||
|
||||
|
||||
void
|
||||
qemuNbdkitProcessFree(qemuNbdkitProcess *proc)
|
||||
{
|
||||
@ -674,3 +838,89 @@ qemuNbdkitProcessFree(qemuNbdkitProcess *proc)
|
||||
g_clear_object(&proc->caps);
|
||||
g_free(proc);
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
qemuNbdkitProcessStart(qemuNbdkitProcess *proc,
|
||||
virDomainObj *vm,
|
||||
virQEMUDriver *driver)
|
||||
{
|
||||
g_autoptr(virCommand) cmd = NULL;
|
||||
int rc;
|
||||
int exitstatus = 0;
|
||||
g_autofree char *errbuf = NULL;
|
||||
virTimeBackOffVar timebackoff;
|
||||
g_autoptr(virURI) uri = NULL;
|
||||
g_autofree char *uristring = NULL;
|
||||
|
||||
if (!(cmd = qemuNbdkitProcessBuildCommand(proc)))
|
||||
return -1;
|
||||
|
||||
VIR_DEBUG("starting nbdkit process for %s", proc->source->nodestorage);
|
||||
virCommandSetErrorBuffer(cmd, &errbuf);
|
||||
virCommandSetPidFile(cmd, proc->pidfile);
|
||||
|
||||
if (qemuExtDeviceLogCommand(driver, vm, cmd, "nbdkit") < 0)
|
||||
goto error;
|
||||
|
||||
if (qemuSecurityCommandRun(driver, vm, cmd, proc->user, proc->group, true, &exitstatus) < 0)
|
||||
goto error;
|
||||
|
||||
if (exitstatus != 0) {
|
||||
virReportError(VIR_ERR_INTERNAL_ERROR,
|
||||
_("Could not start 'nbdkit'. exitstatus: %1$d"), exitstatus);
|
||||
goto error;
|
||||
}
|
||||
|
||||
if ((rc = virPidFileReadPath(proc->pidfile, &proc->pid)) < 0) {
|
||||
virReportSystemError(-rc,
|
||||
_("Failed to read pidfile %1$s"),
|
||||
proc->pidfile);
|
||||
goto error;
|
||||
}
|
||||
|
||||
if (virTimeBackOffStart(&timebackoff, 1, 1000) < 0)
|
||||
goto error;
|
||||
|
||||
while (virTimeBackOffWait(&timebackoff)) {
|
||||
if (virFileExists(proc->socketfile))
|
||||
return 0;
|
||||
|
||||
if (virProcessKill(proc->pid, 0) == 0)
|
||||
continue;
|
||||
|
||||
VIR_WARN("nbdkit died unexpectedly");
|
||||
goto errorlog;
|
||||
}
|
||||
|
||||
VIR_WARN("nbdkit socket did not show up");
|
||||
|
||||
errorlog:
|
||||
if ((uri = qemuBlockStorageSourceGetURI(proc->source)))
|
||||
uristring = virURIFormat(uri);
|
||||
|
||||
virReportError(VIR_ERR_OPERATION_FAILED,
|
||||
_("Failed to connect to nbdkit for '%1$s': %2$s"),
|
||||
NULLSTR(uristring), NULLSTR(errbuf));
|
||||
|
||||
error:
|
||||
qemuNbdkitProcessStop(proc);
|
||||
return -1;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
qemuNbdkitProcessStop(qemuNbdkitProcess *proc)
|
||||
{
|
||||
if (proc->pid < 0)
|
||||
return 0;
|
||||
|
||||
VIR_DEBUG("Stopping nbdkit process %i", proc->pid);
|
||||
virProcessKill(proc->pid, SIGTERM);
|
||||
|
||||
unlink(proc->pidfile);
|
||||
unlink(proc->socketfile);
|
||||
proc->pid = -1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -38,6 +38,8 @@ typedef enum {
|
||||
|
||||
VIR_ENUM_DECL(qemuNbdkitCaps);
|
||||
|
||||
typedef struct _virQEMUDriver virQEMUDriver;
|
||||
|
||||
qemuNbdkitCaps *
|
||||
qemuNbdkitCapsNew(const char *path);
|
||||
|
||||
@ -74,6 +76,14 @@ struct _qemuNbdkitProcess {
|
||||
pid_t pid;
|
||||
};
|
||||
|
||||
int
|
||||
qemuNbdkitProcessStart(qemuNbdkitProcess *proc,
|
||||
virDomainObj *vm,
|
||||
virQEMUDriver *driver);
|
||||
|
||||
int
|
||||
qemuNbdkitProcessStop(qemuNbdkitProcess *proc);
|
||||
|
||||
void
|
||||
qemuNbdkitProcessFree(qemuNbdkitProcess *proc);
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user